Microstructure and critical current density of Bi2212 tapes grown by magnetic melt-processing

H. Maeda; K. Ohya; M. Sato; W. P. Chen; K. Watanabe; M. Motokawa; A. Matsumoto; H. Kumakura; J. Schwartz

doi:10.1016/S0921-4534(02)01192-9

Microstructure and critical current density of Bi2212 tapes grown by magnetic melt-processing

H. Maeda, K. Ohya, M. Sato, W. P. Chen, K. Watanabe, M. Motokawa, A. Matsumoto, H. Kumakura, J. Schwartz

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Vertical magnetic fields up to 9 T were applied to the magnetic melt-processing (MMP) of dip-coated and Ag-sheathed Bi2212 mono-core tapes with a core thickness of about 150 μm, which were set horizontally. SEM observation shows that a uniform high-degree of texture is formed throughout the thickness of the tapes by the magnetic field H_a during MMP, whereas a large portion of the area is non-textured without H_a. The critical current density J_c of the tapes increases with increasing H_a up to about 6 T due to the texture development. However, when H_a>6 T some disturbance in J_c appears; one is increased and the other is decreased. This may be due to the change of O₂ atmosphere around the tapes during MMP, which comes from the change of O₂ gas flowing by the magnetic field. The results suggest that a high magnetic field is very effective to enhance the texture development and to fabricate tapes with high critical current I_c.

Original language	English
Pages (from-to)	33-37
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	382
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(02)01192-9
Publication status	Published - 2002 Oct 15
Externally published	Yes

Keywords

Bi-2212/Ag tape
Critical current density
Magnetic field melt growth process
Texture

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(02)01192-9

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title = "Microstructure and critical current density of Bi2212 tapes grown by magnetic melt-processing",

abstract = "Vertical magnetic fields up to 9 T were applied to the magnetic melt-processing (MMP) of dip-coated and Ag-sheathed Bi2212 mono-core tapes with a core thickness of about 150 μm, which were set horizontally. SEM observation shows that a uniform high-degree of texture is formed throughout the thickness of the tapes by the magnetic field Ha during MMP, whereas a large portion of the area is non-textured without Ha. The critical current density Jc of the tapes increases with increasing Ha up to about 6 T due to the texture development. However, when Ha>6 T some disturbance in Jc appears; one is increased and the other is decreased. This may be due to the change of O2 atmosphere around the tapes during MMP, which comes from the change of O2 gas flowing by the magnetic field. The results suggest that a high magnetic field is very effective to enhance the texture development and to fabricate tapes with high critical current Ic.",

keywords = "Bi-2212/Ag tape, Critical current density, Magnetic field melt growth process, Texture",

author = "H. Maeda and K. Ohya and M. Sato and Chen, {W. P.} and K. Watanabe and M. Motokawa and A. Matsumoto and H. Kumakura and J. Schwartz",

note = "Funding Information: This research is a part of the project “Creation of Novel Materials in High Magnetic Fields” supported by the Japan Science and Technology Corporation.",

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T1 - Microstructure and critical current density of Bi2212 tapes grown by magnetic melt-processing

AU - Maeda, H.

AU - Ohya, K.

AU - Sato, M.

AU - Chen, W. P.

AU - Watanabe, K.

AU - Motokawa, M.

AU - Matsumoto, A.

AU - Kumakura, H.

AU - Schwartz, J.

N1 - Funding Information: This research is a part of the project “Creation of Novel Materials in High Magnetic Fields” supported by the Japan Science and Technology Corporation.

PY - 2002/10/15

Y1 - 2002/10/15

N2 - Vertical magnetic fields up to 9 T were applied to the magnetic melt-processing (MMP) of dip-coated and Ag-sheathed Bi2212 mono-core tapes with a core thickness of about 150 μm, which were set horizontally. SEM observation shows that a uniform high-degree of texture is formed throughout the thickness of the tapes by the magnetic field Ha during MMP, whereas a large portion of the area is non-textured without Ha. The critical current density Jc of the tapes increases with increasing Ha up to about 6 T due to the texture development. However, when Ha>6 T some disturbance in Jc appears; one is increased and the other is decreased. This may be due to the change of O2 atmosphere around the tapes during MMP, which comes from the change of O2 gas flowing by the magnetic field. The results suggest that a high magnetic field is very effective to enhance the texture development and to fabricate tapes with high critical current Ic.

AB - Vertical magnetic fields up to 9 T were applied to the magnetic melt-processing (MMP) of dip-coated and Ag-sheathed Bi2212 mono-core tapes with a core thickness of about 150 μm, which were set horizontally. SEM observation shows that a uniform high-degree of texture is formed throughout the thickness of the tapes by the magnetic field Ha during MMP, whereas a large portion of the area is non-textured without Ha. The critical current density Jc of the tapes increases with increasing Ha up to about 6 T due to the texture development. However, when Ha>6 T some disturbance in Jc appears; one is increased and the other is decreased. This may be due to the change of O2 atmosphere around the tapes during MMP, which comes from the change of O2 gas flowing by the magnetic field. The results suggest that a high magnetic field is very effective to enhance the texture development and to fabricate tapes with high critical current Ic.

KW - Bi-2212/Ag tape

KW - Critical current density

KW - Magnetic field melt growth process

KW - Texture

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Microstructure and critical current density of Bi2212 tapes grown by magnetic melt-processing

Abstract

Keywords

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